fix: Introduce Image format options in CLI. Silence the tqdm downloading messages.

[nikos-livathinos]

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This is a fix to:

• Introduce format options in the docling CLI for Image with the same pipeline_options as for PDF. This allows the CLI parameters to be applied in case of image inputs.
• Add RapidOcrOptions to the Union of ocr_options for PdfPipelineOptions.
• Silence the tqdm messages during the downloading of model files.

Issues resolved by this Pull Request: Resolves #505 #208

Checklist:

• [x] Documentation has been updated, if necessary.
• [x] Examples have been added, if necessary.
• [x] Tests have been added, if necessary.

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[cau-git]

Maybe one more check to do is, if the input format is an image, OCR must be activated for its pipeline options (independent of the global OCR choice)